Mechanical refrigeration



Aug. 11, 1925. 1,549,335

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[22 vezz for Patented Au 11, 1925.

UNITED STATES PATENT OFFICE.

CHARLES C. SPBEEN, OF DETROIT, MICHIGAN, ASSIGNOR TO KELVINATOR CORPORA- 'I'ION, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

' MECHANICAL REFRIGERATION.

Application filed Iareh 14, 1925. Serial 110. 15,447.

To all whom it may concern:

Be it known that I, CHARLES C. SPREEN, a citizen of the United States of America, and a resident of Detroit, in the county of Wayne and State of Michigan, have invent- -ed certain new and useful Improvements in Mechanical'Refrigeration, of which the following is a full, clear, and exact description.

My invention relates to mechanical refrigeration, particularly to refrigerating cabinets of the type used-by retailers for refrigerating ice cream, and the principal object of my invention is to provide a new and improved cabinet of this type. In the drawlngs accompanying this specification and forming'a part thereof, I have shown, for purposes of illustration, one form which my invention may assume. In these drawings:

Figure 1 is a front elevation of this illustrative embodiment of my-invention,

Fi re 2 'is a view similar to Figure 1 but showmg the cover raised and the closure partly raised.

Figure 3 is a longitudinal section through the refrigerating section of the cabinet.

Figure 4 is a horizontal section through the brine tank illustrating the expansion coil unit.

Figure 5 is a fragmentary side elevation of the expansion coil unit.

Figure 6 is a longitudinal section through the machinery'compartment of the cabinet.

Figure'7 is-a section on the line 77 0 Figure 6.

Figure 8 is a section on the line 8-8 of Figure 7, and

Fi re 9 is a fragmentary'section taken on the line 9-'9 of Figure 7. v

El e cabinet herein shown comprises a refrigerating section 21 and a machinery compartment 22. I

The refrigerating section herein shown comprises six upwardly opening receptacles 23 each adapted to receive an ice cream can of the usual type and each supported by means of cross strips 24 superimposed upon runners 25 resting upon the bottomwall 26 of a brine tank 27 surroundedfa'nd supported from the frame of the cabinet, by insulating material disposed within the space 28 and omitted from the drawings to facilitate disclosure of other parts.

The frame of the cabinet comprises two lower longitudinal angles 29 extending the entire length of the cabinet, two co-extensive upper longitudinal angles 30, a plurality of cross angles 31 extending between the lower longitudinal angles 29 and secured thereto by means of tie plates 32, a plurality of cross angles 33 extending between the upper longitudinal angles and secured thereto by tie plates 34, a plurality of -vertical angles 35 extending between the upper and lower longitudinal angles on each side and riveted directly thereto. Within this frame are panels 36 closing the bottom of the refrigerating section 21, dividing the refrigerating section 21 and the machinery compartment 22 is a panel 41 secured to the cross and vertical angles present at that point, exteriorly of the frame are end panels 37 and side panels 38 closing the two ends of the frame and the two sides of the refrigerating section 21 and secured in position upon the frame both by machine screws ex tending through the panels directly into the frame and also by cover strips 39 secured to the frame by means of suitable machine screws 40 and serving to not only additionally secure the panels in position but also to cover and conceal the joints between panels, while closing the upper surface of the brine tank 27 exteriorly of the receptacles 23 is a metal top plate 42 secured in turn to an annular wooden top plate 43 which closes the annular space between the top of the brine tank 27 and the top of the walls 37, 38, v

spaced coils 46 each extending from the bottom. face ofthe inlet header 44 about thereceptacles 23 and thence into the bottom face of the outlet header 45. Extending from the outlet header 45 is a duct 47 connected, through a fitting 48 sealed into the .wall of the brine tankv 27,-to one end of a duct 49 which leads to the inlet valve 50 of a compressor 51 having its outlet valve 52 connected by means of a duct 53 to a condenser 54 leading into a storage chamber 55 connected to the inlet header 44 through a duct 56, an expansion valve 57, a duct 58, a

fitting 59 sealed into the wall of the refrigerating chamber 27 and a duct 60.

The condenser 54 is disposed in one end of the machinery compartment 22 and sep- 1 adjacent longitudinal 'angle 29.

arated from the balance of the machinery compartment by means ofa panel 61 secured to a pair of vertical angles 62 and provided with an aperture 63 disposed in front of fans 64 and 65 carried respectively by the pulley 66 of the compressor 51 and the shaft 67 of a motor 68 which operates the compressor 51 by means of a belt 70 extending between the compressor pulley 66 and a pulley 69 on the motor shaft 67. The compressor unit is supported upon a base 71 which is in turn carried by longitudinal members 72 supported at their ends by a cross member 73 extending between the two lower longitudinal angles 29 at a point adjacent the dividing wall 41, and a cross member 74 disposed adjacent the end wall 27 and effective to' support the reservoir 55 by means of straps 75 secured to the cross member74 and extending about the reservoir 55.

Thea1r current directed upon the con-i denser 54 by the fans 64 and 65 is drawn principally from the air space 76 created beneath the cabinet by mounting the cabinot on blocks 77, for this reason serves to afford an air circulation beneath the cabinet, at the same time consists of probably the coolest air in the entire room, and escapes from the condenser compartment through louvers 7 8 in the end wall 37.

Closing the front and back of the machinery compartment 22 are closures 79 identical in appearance with the panels 37 and 38. meeting the panels 37 and 38 at vertical joints overlaid by cover strips 39 in the same manner as a joint between two of the panels 37 and 38, and secured at their lower edges by means of fingers 80 riveted to the closures 79 and engaging over the vertical arm of the The primary securingmeans for these closures 79.

- however, is a pair of elongated tongues 81 secured to the two edges of each closure 79 and engag ng one behind the vertical angle -member 35 connecting the longitudinal angles 29 and 30 at the adjacent corner of the cabinet and the other behind a special angle member 82 secured to the vertical angle member 35 connecting the longitudinal angle members 29 and 30 at the adjacent end of the partition 41 separating the refrigerating section 21 from the machinery compartment 22.

It will be obvious from the 'above description that these closure members can be removed only byreciprocation upwardly.

The top of the entire cabinet is closed by a single cover comprising a wooden body 84 and an enameled sheet metal facing 85. overlying the body 84, provided with-a plurality of apertures 86 registering with the tops of the receptacles 23 and arranged to be closed by means of removable Iclosures 87. hinged along the rear wall of the cabinet as shown in Figure 2, secured in closed position in ranged overlying the removable closures 79 to completely prevent removal of the rear closure 79 until the cover is removed from therabinet and to prevent removal of the front closure 79 until the cover has been lifted an appreciable distance.

It will be obvious that lifting of the cover to permit removal of the front closure 79 will interfere with access to the receptacles 23 and it will therefore be obvious that the closure 79 will not be accidentally left in partially open position.

It will also be obvious that I have provided a cabinet superior to any cabinet-heretofore devised, particularly in its ventilating system, its expansion unit, and its interlock between the cover and the removable closure to prevent the removable closure being left open accidentally. Those skilled in the art, however, will find advantages in this construction other than those specifically pointed outherein and at the same time will realize that the particular embodiment of my invention herein shown and described may be variously changed and modified without departing from the spirit of my invention or sacrificing the advantages thereof.

It will therefore be understood that this disclosure is illustrative only and that my invention is not limited thereto.

I claim:

1. A refrigerating cabinet comprising a refrigerating section provided with at least one upwardly opening chamber arranged to receive material to be refrigerated. a machinery compartment disposed beside said section and provided with an opening in its lateral wall arranged to afford access to the interior of said compartment, a closure for said opening, a cover overlying said chamber and said compartment and apertured to afford access to said chamber, a member effective to close said aperture. and means se curing said closure in position effective to prevent removal of said closure when said cover is closed and ineffective to prevent removal of said closure when said cover is open.

2. A refrigerating cabinet comprising a refrigerating section provided with at least one upwardly opening chamber arranged to receive material to be refrigerated. a machinery compartment disposed beside said section and provided with an opening in its lateral wall arranged to afford access to the interior of said compartment, a closure for said opening mounted to be removed by sliding upwardly. and a cover overlying said chamber and said compartment, apertured to afford access to said chamber. including a member effective to close said aperture, and overlying said closure to prevent up- 'Ward movement and removal of said closure until said cover has beenmoved an appreciable distance from closed position.

3. A refrigerating cabinet comprising a refrigerating section provided with at least one ,u'pwardly opening chamber arranged to receive material to be refrigerated, machinery and condenser compartments disposed beside said section and each provided with an opening in its lateral wall arranged to afi'ord access to the interior of that compartment, closure means for said openings mounted to be removed by sliding upwardly, and a cover overlying said chamber and said compartments, apertured to afford access to said chamber including a member effective to close said aperture, and overlying said closure means to prevent upward movement andremoval ofsaid closure means until said cover has been moved an appreciable distancefrom closed position.

4. A refrigerating cabinet comprising a refrigerating section spaced from the floor, a compartment disposed beside said refrigerating section and provided with an opening communicating with the space below said section, a compressor unit and a condenser located in said compartment, and means operated by said unit arranged to establish anair current from 'said opening against said condenser. h

In testimony whereof I hereunto aflix my signature. 7

CHARLES C. SPREEN. 

